CAIRO - Egyptians began voting on Wednesday in the nation's first genuine presidential election that will pick the man to replace Hosni Mubarak who was ousted in a popular uprising last year.

Polling stations opened at 8 a.m., television reported. They will close at 8 p.m. With none of the 12 candidates bidding for Egypt's top job expected to win the first round outright, a second round is planned for mid-June.

The wide open election pits Islamists against men who served under deposed leader Hosni Mubarak.

The contest is a novelty for a nation where elections during the 30-year rule of a man some called "Pharaoh" were thinly attended rigmaroles in which the result was a foregone conclusion.

This time Egypt's 50 million eligible voters are expected to turn out in force to determine who will lead the country after the generals who have overseen a transition marred by violence, protests and political deadlock formally hand over by July 1.

Voters have been blitzed by three weeks of official campaigning, which ended on Sunday. Egypt held its first US-style televised presidential debate. Newspapers have carried interviews and campaign adverts. Banners and posters festoon the streets.

It will be the first time that ordinary Egyptians, ruled down the centuries by pharaohs, sultans, kings and military officers, will have a genuine chance to choose their leader.

But whoever wins faces a huge task to deliver changes that Egyptians expect to relieve a grim economic outlook. The military that was a pillar of Mubarak's rule is likely to remain a powerful political force for years.

Election results worry West, Israel, Gulf states

The army, whose senior ranks also have extensive commercial interests, insists it does not want to hang onto power.

"With these elections, we will have completed the last step in the transitional period," General Mohamed el-Assar told a news conference on the eve of voting.

The West, long wary of Islamists, and Israel, worried about its 33-year-old peace treaty with Egypt, are watching to see if proponents of political Islam add to their gains after sweeping most seats in a parliamentary vote that ended in January.

Many Gulf states are equally concerned about who will lead the regional heavyweight after their long-time ally Mubarak was ousted. Their conservative monarchies have so far emerged from a wave of Arab uprisings relatively unscathed.

Seeking to allay such worries, the Muslim Brotherhood's candidate, Mohamed Mursi, pledged in a final rally on Sunday that "we will not export our revolution to anyone."

Mursi was pitched into the race at the last minute after the Brotherhood's first-choice candidate was ruled out. He may lack charisma, but he can rely on the Brotherhood's vote machine.

His rivals include Abdel Moneim Abol Fotouh, an Islamist who has drawn support ranging from liberals to hardline Salafi Muslims; former foreign minister and Arab League chief Amr Moussa, who has been a public figure for years with strong name recognition; and Ahmed Shafiq, Mubarak's last prime minister, who like his former boss, once commanded the air force.

Making a late surge is Hamdeen Sabahy, a leftist inspired by Gamal Abdel Nasser, whose "Free Officers" overthrew King Farouk in 1952 and set up the system that has put military men in the presidency for the past 60 years.

Under pressure from Washington, his key ally and financial sponsor, to open up politics, Mubarak in 2005 staged Egypt's first multi-candidate presidential race. But rules barred any realistic challenge to him. Another vote had been due in 2011 but he was toppled by a popular uprising before that.